Details: Replacement Model:DSD4121 DSD4121RV. Brand: Generic. Condition: Brand new. No programming or setup required, easy and simple to operate. Perfect replacement for lost or broken remote control. 30 days money back guarantee & 12 months warranty from manufacturing defects. Accept return and exchange in warranty period. This Remote Control fit for Below Knowing Models: DSD4921RV For DSD4121, DSD4121PVR , DSD4121RV , DSR4639. Note: If your model number is not listed above or your original remote is different from this remote, please email us to confirm suitability.